Tool for connecting electric conduits



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M. OESER TOOL -FOR CONNECTING ELECTRIC CONDUITS Filed July 21 maerzfor:I

fierfiiiy Patented Nov. l8, 12d.

MINNA OESER, OF CASSEL, GERMANY.

TOOL FOR CONNECTING ELECTRIC C'ONDUITS.

Application filed July 21, 1921.

T all whom it may concern Be it known that I, MINNA Onsnn (nee XVEIGEL),a citizen of the German Republic, and residing at Cassel, Germany, haveinvented certain new and useful Improvements in a Tool for ConnectingElectric Conduits, of which the following is a specilication.

As known in the art, the electric conduits inv branch boxes, which aregenerally located at high position in the wall, are connected by meansof short headless screws. The insertion of said short grub screws, byhand, is rather cun'ibersome and ti1ne-\vasti11g,tl1e small screws oftenfalling down and getting lost.

The present invention provides an improved tool by means of which theinsertion of said grub screws can be easily and quickly effected in amechanical way, while, besides, the deformation of the hood terminalsfrequently occurring with the connection of a plurality of conduits isavoided, the conduits themselves receiving, finally, a reliableconnection.

A further advantage of the improved tool is that the ends of theconduits to be conuected need not be held fast by hand.

The accompanying drawing shows the improved tool in Figs. 1 and 2 in twoside views. at right angles to one another, partly in section, while F 3shows its mode of application with the screw driver removed.

A shell 0, with upper guiding-rings 7) serves as a holder for thescrew-driver c and carries below a blade spring at which covers a recessin the foot of said shell. The shell is closed at said foot, while atits upper part it is of semi-circular cross-section. A blade spring 6 inthe upper part of said shell serves as a guide for said screw-driver,and a Serial No. 486,571,

groove f in the screw driver forming a stop for said spring a preventsthe latter from being unintentionally drawn out of said shell.

For intended use of the tool, the screwdriver assumes first the positionshown in Figs. 1 and 2, and the grub screw g is placed in the foot ofsaid shell behind the blade spring 03, the latter preventing the samefrom falling out. Thereupon, the shell (1 is put in position with itstoot end resting upon the hood terminal it of the branch box. Theconduits i inserted in said terminal. are pressed together by saidshell, so that they receive an intimate contact, whereupon the grubscrew 9 is tightened by means of the screw-driver lowered for thispurpose, this being effected in an easy and reliable way, anydeformation of the hood terminal being prevented by the shell a,engaging over the latter. i

lVhat I claim, is:

A screw driving tool comprising a shank, guides on said shank forslidably and rotata-bly holding a screw driver, a spring on said shankadapted to press against the screw driver and frictionally hold thesame. a screw holder adjacent the lower end of the shank, and open onone side, a spring closing the open side and adapted to press against ascrew in the head to hold the same therein, and a socket at the lowerextremity of the head adapted to [it a conduit terminal.

In testimony whereof l. have hereunto set my hand in the presence of twosubscribing witnesses.

MINNA OESER.

Witnesses U HAASE, ALFRED OESER.

